CN109540184A - A kind of automatic switching system and its application method of sea cable distributed monitoring optical path - Google Patents
A kind of automatic switching system and its application method of sea cable distributed monitoring optical path Download PDFInfo
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- CN109540184A CN109540184A CN201811521838.XA CN201811521838A CN109540184A CN 109540184 A CN109540184 A CN 109540184A CN 201811521838 A CN201811521838 A CN 201811521838A CN 109540184 A CN109540184 A CN 109540184A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
- G01D5/35358—Sensor working in reflection using backscattering to detect the measured quantity
- G01D5/35364—Sensor working in reflection using backscattering to detect the measured quantity using inelastic backscattering to detect the measured quantity, e.g. using Brillouin or Raman backscattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/324—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres using Raman scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
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Abstract
The present invention provides a kind of automatic switching system of sea cable distributed monitoring optical path, including integrated monitoring platform, the main monitoring changeover apparatus of OTDR, OTDR from monitoring changeover apparatus, sea cable and distributing optical fiber sensing equipment, the main monitoring changeover apparatus of OTDR and OTDR are separately connected the both ends of sea cable from monitoring changeover apparatus, the main monitoring changeover apparatus of OTDR and OTDR are connected separately with a distributing optical fiber sensing equipment from monitoring changeover apparatus, and the main monitoring changeover apparatus of OTDR, OTDR are separately connected integrated monitoring platform from monitoring changeover apparatus and distributing optical fiber sensing equipment.The first, it is detected under normal circumstances in sea cable distributed fiberoptic sensor, the link load of synchronous all optical fiber of monitoring, the disconnected fine fibre core of discovery in time, and assesses various optical fiber circuits combinations, carry out optical path combined loss ranking, screen optimal optical path combination；The combination of entire optical path when sea cable distributed fiberoptic sensor detection optical path occurs fracture or is lost excessive, is switched to optimal optical path and combined by second.
Description
Technical field
The present invention relates to a kind of system of sea cable distributed monitoring optical path, in particular to a kind of sea cable distributed monitoring optical path
Automatic switching system.
Background technique
Photoelectric composite sea cable is one of main large electric equipment of offshore power grid, construction and maintenance engineering is huge, skill
Art is complicated.Due to complicated by construction installation, construction technology, the heavy-duty service of cable, the complicated geological structure in sea area and sea
The influence of the factors such as running environment so that it occur frequently that the unexpected stress in submarine optical fiber cable part and keep fiber unit impaired, or make to transport
There are the failures such as open circuit, short circuit in subsea power cable in row.Therefore, imposing to composite sea cable and laying special stress on protecting work is that construction is answered
First choice in；Distributed Optical Fiber Sensing Techniques rise with the development of Fibre Optical Communication Technology, are one kind using light wave as carrier,
Optical fiber is medium, for perceiving and transmitting the New Sensing Technology of extraneous measured signal (such as temperature, stress, disturbance).Point
Cloth optical fiber is with corrosion-resistant, electromagnetism interference is strong, highly-safe, good insulation preformance, measurement accuracy are high, can completely measure
Advantage is gradually widely applied in such as science of bridge building, Tunnel Engineering and electric system.And power communication networking over strait
Actual use optical fiber is few, and general sea cable has 48 cores even more, and a large amount of redundancy fibre core can be comprehensively utilized as monitoring
The sensing components of sea cable provide rare natural sensing components and letter for sea cable scientific research and on-line monitoring system
Carrier is ceased, saves and is laid with dedicated sensor fibre great amount of investment cost；Existing research at present has based on Raman in sea cable monitoring
Distributed temperature sensor (ROTDR), the distributed temperature/strain transducer based on spontaneous Brillouin technology of scattering
(BOTDR), distributed temperature/strain transducer (BOTDA) based on excited Brillouin, be based on Rayleigh scattering phase sensitive light when
The perturbation sensor (φ-OTDR) of field technique.The online comprehensive monitor system of current sea cable is formed by these technologies.Based on distribution
The sea cable monitoring systematic difference of formula fibre optical sensor and research are all concentrated on using optical fiber as around media-aware optical fiber and along the line
Temperature, strain and vibration variation measurement, and there is no online evaluation to optical fiber health status itself, once optical fiber occur therefore
Barrier can only wait artificial investigation and replacement monitoring optical path.
Summary of the invention
[1] technical problems to be solved
It works the technical problem to be solved in the present invention is to provide one kind in sea cable distributed fiberoptic sensor while monitoring biography
Sense and other not the health status of optical path can automatically switch optical system for testing to declining when detecting optical path and being broken
Subtract the automatic switching system of the sea cable distributed monitoring optical path in the optimal optical path of minimum wire.
[2] technical solution solved the problems, such as
The present invention provides a kind of automatic switching system of sea cable distributed monitoring optical path, including integrated monitoring platform, OTDR
From monitoring changeover apparatus, sea cable and distributing optical fiber sensing equipment, the main monitoring of OTDR is switched by main monitoring changeover apparatus, OTDR
Device and the OTDR are separately connected the both ends of the sea cable from monitoring changeover apparatus, the main monitoring changeover apparatus of the OTDR and institute
It states OTDR and is connected separately with the distributing optical fiber sensing equipment from monitoring changeover apparatus, the main monitoring of OTDR is switched
Device, the OTDR are separately connected the integrated monitoring platform from monitoring changeover apparatus and the distributing optical fiber sensing equipment；
It include more single mode optical fibers in the sea cable；The main monitoring changeover apparatus of OTDR includes the first OTDR module and the first optical path pair
Interface, first optical path connect the distributing optical fiber sensing equipment to interface, and first optical path on interface to connecting
It is connected to first filter, the first photoswitch is connected in the first filter, multiple are connected on first photoswitch
The multiplexing of one wave crest, each primary peak multiplexing are separately connected one end of the every single mode optical fiber, the first OTDR mould
It is connected with second filter on block, the second photoswitch is connected in the second filter, second photoswitch is separately connected
Each primary peak multiplexing, the first OTDR module are separately connected first photoswitch and second photoswitch；
The OTDR includes the 2nd OTDR module and the second optical path to interface from monitoring changeover apparatus, and second optical path connects interface
Another described distributing optical fiber sensing equipment, second optical path are filtered to third filter, the third is connected on interface
It is connected with third photoswitch on wave device, multiple secondary peak multiplexings, each second wave are connected on the third photoswitch
Peak is multiplexed the other end for being separately connected the every single mode optical fiber, is connected with the 4th filter in the 2nd OTDR module, institute
It states and is connected with the 4th photoswitch on the 4th filter, the 4th photoswitch is separately connected each secondary peak multiplexing, institute
It states the 2nd OTDR module and is separately connected the third photoswitch and the 4th photoswitch.
Further, OTDR described in the main monitoring changeover apparatus of the OTDR from monitoring changeover apparatus, the distribution type fiber-optic
It is connected between sensing equipment and the integrated monitoring platform by Ethernet.
Further, the first OTDR module is identical structure, the first OTDR mould with the 2nd OTDR module
It include: the distributed temperature sensor based on Raman scattering, the distributed temperature based on spontaneous Brillouin technology/strain biography in block
Field technique when sensor, distributed temperature/strain transducer based on excited Brillouin are with based on Rayleigh scattering phase sensitive light
Perturbation sensor.
Further, the distributed temperature sensor based on Raman scattering, described based on spontaneous Brillouin technology
Distributed temperature/strain transducer, the distributed temperature/strain transducer based on excited Brillouin are based on Rayleigh with described
The perturbation sensor of field technique is single mode module when scattering phase sensitive light.
Further, the first filter only allows 1550nm laser to pass through with the third filter.
Further, the second filter only allows 1625nm laser to pass through.
Further, the 4th filter only allows 1310nm laser to pass through.
A kind of application method of the automatic switching system of sea cable distributed monitoring optical path, comprising the following steps:
A, the main monitoring changeover apparatus of the long-range control OTDR in integrated monitoring platform backstage, OTDR are opened from monitoring changeover apparatus
Dynamic test；
B, the main monitoring changeover apparatus of the OTDR and OTDR test the every single mode optical fiber from monitoring changeover apparatus respectively,
It obtains the loss situation of the every single mode optical fiber and is sent to the integrated monitoring platform；
C, the loss situation of the comprehensive every single mode optical fiber in integrated monitoring platform backstage, to be lost it is excessive or
There is the single mode optical fiber alarm for the fibre that breaks, to not sorting from small to large in the single mode optical fiber used according to loss, will be lost
Preference of the smallest single mode optical fiber as auto switching；
D, it is repeated continuously step a-c, once find that the sensing optical path of the distributing optical fiber sensing equipment is abnormal
Then in auto switching to the smallest single mode optical fiber of loss.
Further, in stepb, the loss value of the every single mode optical fiber take the main monitoring changeover apparatus of the OTDR with
The OTDR tests resulting average value from monitoring changeover apparatus respectively.
[3] beneficial effect
The invention has the advantages that first, sea cable distributed fiberoptic sensor detection under normal circumstances, all light of synchronous monitoring
Fine link load, the disconnected fine fibre core of discovery in time, and various optical fiber circuit combinations are assessed, optical path combined loss ranking is carried out,
Screen optimal optical path combination；Second when sea cable distributed fiberoptic sensor detection optical path occurs fracture or is lost excessive, will
Entire optical path combination switches to optimal optical path combination.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the automatic switching system of sea cable distributed monitoring optical path of the present invention；
Fig. 2 is the main monitoring changeover apparatus of OTDR and OTDR in the automatic switching system of sea cable distributed monitoring optical path of the present invention
From the structural schematic diagram of monitoring changeover apparatus.
Specific embodiment
With reference to the accompanying drawing, the embodiment of the present invention is discussed in detail.
- Fig. 2 refering to fig. 1, the present invention provide a kind of automatic switching system of sea cable distributed monitoring optical path, including comprehensive prison
Platform 1, the main monitoring changeover apparatus 2 of OTDR, OTDR are surveyed from monitoring changeover apparatus 3, sea cable 4 and distributing optical fiber sensing equipment 5,
The main monitoring changeover apparatus 2 of OTDR and OTDR are separately connected the both ends of sea cable 4 from monitoring changeover apparatus 3, and dress is switched in the main monitoring of OTDR
It sets 2 and OTDR and is connected separately with a distributing optical fiber sensing equipment 5 from monitoring changeover apparatus 3, dress is switched in the main monitoring of OTDR
It sets 2, OTDR and is separately connected integrated monitoring platform 1 from monitoring changeover apparatus 3 and distributing optical fiber sensing equipment 5；Include in sea cable 4
More single mode optical fibers；The main monitoring changeover apparatus 2 of OTDR includes the first OTDR module 6 and the first optical path to interface 9, the first optical path pair
Interface 9 connects a distributing optical fiber sensing equipment 5, and to first filter 10 is connected on interface 9, first filters the first optical path
It is connected with the first photoswitch 11 on device 10, multiple primary peak multiplexings 12, each primary peak are connected on the first photoswitch 11
Multiplexing 12 is separately connected one end of every single mode optical fiber, is connected with second filter 7, second filter 7 in the first OTDR module 6
On be connected with the second photoswitch 8, the second photoswitch 8 is separately connected each primary peak multiplexing 12, and the first OTDR module 6 connects respectively
Connect the first photoswitch 11 and the second photoswitch 8；OTDR includes the 2nd OTDR module 13 and the second optical path pair from monitoring changeover apparatus 3
Interface 16, the second optical path connect another distributing optical fiber sensing equipment 5 to interface 16, and the second optical path on interface 16 to being connected with
Third filter 17 is connected with third photoswitch 18 on third filter 17, multiple second waves is connected on third photoswitch 18
Peak multiplexing 19, each secondary peak multiplexing 19 are separately connected the other end of every single mode optical fiber, connect in the 2nd OTDR module 13
There is the 4th filter 14, the 4th photoswitch 15 is connected on the 4th filter 14, the 4th photoswitch 15 is separately connected each second
Wave crest multiplexing 19, the 2nd OTDR module 13 is separately connected third photoswitch 18 and the 4th photoswitch 15.
A preferred embodiment of the invention is described below: the main monitoring changeover apparatus 2 of OTDR, OTDR in the present embodiment
It is connected between monitoring changeover apparatus 3, distributing optical fiber sensing equipment 5 and integrated monitoring platform 1 by Ethernet；First OTDR
Module 6 is identical structure with the 2nd OTDR module 13, includes the distributed temperature based on Raman scattering in the first OTDR module 6
Sensor (ROTDR), is based on excited Brillouin at distributed temperature/strain transducer (BOTDR) based on spontaneous Brillouin technology
Distributed temperature/strain transducer (BOTDA) with based on Rayleigh scattering phase sensitive light when field technique perturbation sensor
(φ-OTDR), distributed temperature sensor (ROTDR), the distributed temperature based on spontaneous Brillouin technology based on Raman scattering
Degree/strain transducer (BOTDR), distributed temperature/strain transducer (BOTDA) based on excited Brillouin are dissipated with based on Rayleigh
The perturbation sensor (φ-OTDR) of field technique is single mode module when penetrating phase sensitive light；First filter 10 and third filter
Device 17 only allows 1550nm laser to pass through；Second filter 7 only allows 1625nm laser to pass through；4th filter 14 only allows
1310nm laser passes through；The main monitoring changeover apparatus 2 of OTDR uses 1625nm laser acquisition, and OTDR is used from monitoring changeover apparatus 3
1310nm laser acquisition, distributing optical fiber sensing equipment 5 use 1550nm laser acquisition, the main monitoring changeover apparatus 2 of OTDR, OTDR
It does not all interfere with each other, can be carried out simultaneously between monitoring changeover apparatus 3 and distributing optical fiber sensing equipment 5.
The application method of test simple optical fiber is described below: selecting any root light tested by the first OTDR module 6 when in use
Fibre, specific method is: the detection light of the A: the one OTDR module 6 is 1625nm laser, by connecting second after second filter 7
Photoswitch 8 is multiplexed 12 pairs of testing fibers by the primary peak that the selection of the second photoswitch 8 is connect with testing fiber and is monitored,
The effect of primary peak multiplexing 12 is positive: the exploring laser light of 1625nm in the first OTDR module 6 is set with distributing optical fiber sensing
The exploring laser light of 1550nm is coupled on the simple optical fiber connecting with this primary peak multiplexing 12 on standby 5；It is reversed: by single light
1625nm laser on fibre in the mixed light of the 1625nm and 1550nm of back scattering is assigned on the second photoswitch 8, passes through
Two photoswitches 8 are reflected into second filter 7, then feed back to the first OTDR module 6,1550nm laser by second filter 7
It is assigned on the first photoswitch 11, is reflected into first filter 10 by the first photoswitch 11, then pass through first filter 10
Feed back to distributing optical fiber sensing equipment 5；
B: then by the selection test of the 2nd OTDR module 13 with root optical fiber, the detection light of the 2nd OTDR module 13 is 1310nm
Laser selects to connect with root testing fiber by connecting the 4th photoswitch 15 after the 4th filter 14 by the 4th photoswitch 15
The secondary peak connect is multiplexed 19 pairs and is monitored with root testing fiber, and the effect of secondary peak multiplexing 19 is positive: by the 2nd OTDR
In module 13 in the exploring laser light of 1310nm and distributing optical fiber sensing equipment 5 exploring laser light of 1550nm be coupled to this
On the simple optical fiber of two wave crests multiplexing, 19 connection；It is reversed: by the 1310nm and 1550nm of back scattering on this root simple optical fiber
1310nm laser in mixed light is assigned on the 4th photoswitch 15, is reflected into the 4th filter 14 by the 4th photoswitch 15
On, then pass through the 4th filter 14 and feed back to the 2nd OTDR module 13,1550nm laser is assigned on third photoswitch 18, passes through
Third photoswitch 18 is reflected on third filter 17, then feeds back to distributing optical fiber sensing equipment 5 by third filter 17.
A kind of application method of the automatic switching system of sea cable distributed monitoring optical path of the present invention, comprising the following steps:
A, the main monitoring changeover apparatus 2 of the long-range control OTDR in 1 backstage of integrated monitoring platform, OTDR are opened from monitoring changeover apparatus 3
Dynamic test；
B, the main monitoring changeover apparatus 2 of OTDR and OTDR test every single mode optical fiber from monitoring changeover apparatus 3 respectively, obtain every
The loss situation of root single mode optical fiber is simultaneously sent to integrated monitoring platform 1；
C, integrated monitoring platform 1 integrates the loss situation of every single mode optical fiber from the background, to being lost excessive or have a disconnected fibre
Single mode optical fiber alarm, to not the single mode optical fiber used according to loss sort from small to large, the smallest single mode optical fiber will be lost
Preference as auto switching；
D, it is repeated continuously step a-c, if the sensing optical path of discovery distributing optical fiber sensing equipment 5 is abnormal certainly
It is dynamic to be switched on the smallest single mode optical fiber of loss.
In stepb, the loss value of every single mode optical fiber takes the main monitoring changeover apparatus 2 of OTDR and OTDR to switch dress from monitoring
It sets 2 and tests resulting average value respectively.
The invention has the advantages that first, sea cable distributed fiberoptic sensor detection under normal circumstances, all light of synchronous monitoring
Fine link load, the disconnected fine fibre core of discovery in time, and various optical fiber circuit combinations are assessed, optical path combined loss ranking is carried out,
Screen optimal optical path combination；Second when sea cable distributed fiberoptic sensor detection optical path occurs fracture or is lost excessive, will
Entire optical path combination switches to optimal optical path combination.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of automatic switching system of sea cable distributed monitoring optical path, it is characterised in that: including integrated monitoring platform (1),
The main monitoring changeover apparatus (2) of OTDR, OTDR are from monitoring changeover apparatus (3), sea cable (4) and distributing optical fiber sensing equipment (5), institute
It states main monitoring changeover apparatus (2) of OTDR and the OTDR is separately connected the both ends of the sea cable (4) from monitoring changeover apparatus (3),
The main monitoring changeover apparatus (2) of OTDR and the OTDR are connected separately with the distribution from monitoring changeover apparatus (3)
Formula fiber optic sensing devices (5), the main monitoring changeover apparatus (2) of the OTDR, the OTDR are from monitoring changeover apparatus (3) and described point
Cloth fiber optic sensing devices (5) are separately connected the integrated monitoring platform (1)；It include more single mode optical fibers in the sea cable (4)；
The main monitoring changeover apparatus (2) of OTDR includes the first OTDR module (6) and the first optical path to interface (9), first optical path
One distributing optical fiber sensing equipment (5) is connected to interface (9), first optical path is to being connected with first on interface (9)
Filter (10) is connected with the first photoswitch (11) on the first filter (10), connects on first photoswitch (11)
There are multiple primary peak multiplexings (12), each primary peak multiplexing (12) is separately connected the one of the every single mode optical fiber
It holds, is connected with second filter (7) on the first OTDR module (6), is connected with the second light on the second filter (7) and opens
It closes (8), second photoswitch (8) is separately connected each primary peak multiplexing (12), the first OTDR module (6) point
First photoswitch (11) and second photoswitch (8) are not connected；The OTDR includes second from monitoring changeover apparatus (3)
To interface (16), second optical path connects another distributed light interface (16) for OTDR module (13) and the second optical path
Fine sensing equipment (5), second optical path on interface (16) to being connected with third filter (17), the third filter (17)
On be connected with third photoswitch (18), multiple secondary peaks multiplexing (19), Mei Gesuo are connected on the third photoswitch (18)
The other end that secondary peak multiplexing (19) is separately connected the every single mode optical fiber is stated, is connected on the 2nd OTDR module (13)
There is the 4th filter (14), the 4th photoswitch (15), the 4th photoswitch (15) are connected on the 4th filter (14)
It is separately connected each secondary peak multiplexing (19), the 2nd OTDR module (13) is separately connected the third photoswitch
(18) with the 4th photoswitch (15).
2. the automatic switching system of sea cable distributed monitoring optical path as described in claim 1, it is characterised in that: the OTDR master
Changeover apparatus (2), the OTDR are monitored from monitoring changeover apparatus (3), the distributing optical fiber sensing equipment (5) and the synthesis
It is connected between monitoring platform (1) by Ethernet.
3. the automatic switching system and its application method of sea cable distributed monitoring optical path as described in claim 1, feature exist
In: the first OTDR module (6) and the 2nd OTDR module (13) be identical structure, in the first OTDR module (6)
It include: the distributed temperature sensor based on Raman scattering, distributed temperature/strain sensing based on spontaneous Brillouin technology
Field technique disturbs when device, distributed temperature/strain transducer based on excited Brillouin are with based on Rayleigh scattering phase sensitive light
Dynamic sensor.
4. the automatic switching system and its application method of sea cable distributed monitoring optical path as claimed in claim 3, feature exist
In: the distributed temperature sensor based on Raman scattering, the distributed temperature/strain based on spontaneous Brillouin technology
Sensor, the distributed temperature/strain transducer based on excited Brillouin are based on Rayleigh scattering phase sensitive light with described
The perturbation sensor of Time-Domain Technique is single mode module.
5. the automatic switching system of sea cable distributed monitoring optical path as described in claim 1, it is characterised in that: first filter
Wave device (10) only allows 1550nm laser to pass through with the third filter (17).
6. the automatic switching system of sea cable distributed monitoring optical path as described in claim 1, it is characterised in that: second filter
Wave device (7) only allows 1625nm laser to pass through.
7. the automatic switching system of sea cable distributed monitoring optical path as described in claim 1, it is characterised in that: the 4th filter
Wave device (14) only allows 1310nm laser to pass through.
8. the application method of the automatic switching system of the sea cable distributed monitoring optical path as described in claim 1-7 any one,
It is characterized by comprising following steps:
A, the main monitoring changeover apparatus (2) of the long-range control OTDR in the integrated monitoring platform (1) backstage, OTDR are from monitoring changeover apparatus
(3) starting test；
B, the main monitoring changeover apparatus (2) of the OTDR and OTDR test the every single-mode optics from monitoring changeover apparatus (3) respectively
Fibre obtains the loss situation of the every single mode optical fiber and is sent to the integrated monitoring platform (1)；
C, the loss situation of the comprehensive every single mode optical fiber in the integrated monitoring platform (1) backstage, to be lost it is excessive or
There is the single mode optical fiber alarm for the fibre that breaks, to not sorting from small to large in the single mode optical fiber used according to loss, will be lost
Preference of the smallest single mode optical fiber as auto switching；
D, it is repeated continuously step a-c, if finding that the sensing optical path of the distributing optical fiber sensing equipment (5) is abnormal
In auto switching to the smallest single mode optical fiber of loss.
9. the application method of the automatic switching system of sea cable distributed monitoring optical path as claimed in claim 8, it is characterised in that:
In stepb, the loss value of the every single mode optical fiber takes the main monitoring changeover apparatus (2) of the OTDR and the OTDR from monitoring
Changeover apparatus (3) tests resulting average value respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811521838.XA CN109540184A (en) | 2018-12-13 | 2018-12-13 | A kind of automatic switching system and its application method of sea cable distributed monitoring optical path |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361111A (en) * | 2019-08-15 | 2019-10-22 | 广东电网有限责任公司 | A kind of distributed optical fiber temperature sensor temperature accuracy test macro and method |
| CN111404598A (en) * | 2020-04-20 | 2020-07-10 | 深圳市特发信息股份有限公司 | Engineering construction communication optical cable positioning system based on phase sensitive optical time domain reflection |
| CN114486581A (en) * | 2022-01-25 | 2022-05-13 | 三峡珠江发电有限公司 | Dynamic submarine cable fatigue monitoring method for floating type fan |
-
2018
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361111A (en) * | 2019-08-15 | 2019-10-22 | 广东电网有限责任公司 | A kind of distributed optical fiber temperature sensor temperature accuracy test macro and method |
| CN110361111B (en) * | 2019-08-15 | 2021-11-26 | 广东电网有限责任公司 | Temperature precision testing system and method for distributed optical fiber temperature sensor |
| CN111404598A (en) * | 2020-04-20 | 2020-07-10 | 深圳市特发信息股份有限公司 | Engineering construction communication optical cable positioning system based on phase sensitive optical time domain reflection |
| CN114486581A (en) * | 2022-01-25 | 2022-05-13 | 三峡珠江发电有限公司 | Dynamic submarine cable fatigue monitoring method for floating type fan |
| CN114486581B (en) * | 2022-01-25 | 2023-10-31 | 三峡珠江发电有限公司 | Dynamic sea cable fatigue monitoring method for floating fan |
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